Alright guys need some advice here, after a lot of reading and browsing thru every possible forum looking for answers I decided to simply ask? I'm on the process of converting my 302 to fuel injection using the parts from different vehicles so far I have the lower manifold with every component the plenum which also has all components needed I also have the distributor MAF sensor and barometric sensor basically what I'm missing now is the computer, and engine wiring hardness anyway I used this website as a reference for all the parts infohttp://www.hemmings.com/mus/stories/2005/08/01/hmn_feature21.html, I decided to go with vehicles thay are 1991 models and higher because according to this website the 88 models and higher used a MAF sensor which it says that is the self correcting system, I'm just confused now on which computer I should used I found a 1991 crown Victoria that still has the computer and wire hardness would that computer and wire hardness work for my set up?

 

To be honest, if you are wanting to fuel inject your 302 I'd suggest finding an 89 - 93 mustang engine wiring harness and get the computer as well. Not sure when ford changed the 302 firing order from the 351 but as I understand it the only thing that changed was the cam and the location of the spark plug wiring, so having the correct cam for the engine will be essential. I also believe that the older 302 block will have to be converted to a roller block (very simple to do really) to use the newer 302 firing order but don't quote me on that. I'm giving you info on what I've read over the past few months and it's a bit jumbled in my head. Were I home I could be a bit more detailed but as it is now I'm at work and relying on memory (god help us all)

OR..... you can just get the whole engine and associated wiring all the way to the computer from a donor mustang. If this is the rt you wish to go, be sure to get the 89-91.5 Mustang engine and ecu. They come from the factory with forged internals and will stand up to a bit more abuse than the hyper-eucraptic pistons that came in the end of the fox body era cars.

::SIDE NOTE::

If you can find it, the A9L was the most aggressive factory ecu put in the fox era cars, they are in both the standard and auto cars. You can find them in not just mustangs but some fairmonts and lincoln zephyrs as well. Some people will say that's bull corn, but I know from personal experience that they did. I pulled an A9L out of an automatic one owner zephyr. The A9L was supposedly only in standard transmission cars, but you can find them in auto cars as well.

A9M and A9S are also interchangeable between automatics and standards.

Food for thought.

 

Thank you very much for all the info, I was told that if I'm going to used the computer out of a 5.0 HO then I have to change the cam as well cause all 302 HO have a different firing order than the old ones also since I already have most of the parts needed I'm gonna stick with what I have instead of buying a whole engine, so I'm guessing that since I found a computer and wiring hardness out of a 91 crown Victoria 5.0 HO then I'm also going to need the cam out off that engine?!?!

 

Wow and now I also have to convert my block to a roller block!?!? Well this is getting a little complicated, now I have to go to the drawing board and do some research on that conversion.

 

if you don't want to go roller block any 351w cam will do ..same firing order I have converted 3 engines to EFI 2 roller and 1 non ... the Mustang computer is a must with MASS AIR no MASS air NO way to profile the changes made like cam, timing , intake , injectors ect. what ever questions ya got maybe I can help ( we put a HO EFI in a bronco II , built a few mustangs and even un EFI'd a few engines which is not as easy as slam a intake and carb on ) its not so bad man , just sounds bad

 

.... switching to the " HO " or 351w firing takes stress off #1 / # 5 of the crank ...plus ya can say " its an HO "

 

Ok I'm gonna list everything I have so far so you can have a better idea and tell me if is going to work. Ps this parts came out of a 91 Lincoln Mark 7 5.0 HO
.upper and lower manifolds with every single item mounted on it.
.EFI distributor.
.electric fuel pump.
Now this other parts came out of a 91 crown Victoria,
.MAF sensor and barometric sensor.
This 91 crown Victoria was equip with the system that has a MAF sensor so correct if I'm wrong if this vehicle has a maf sensor does that mean that is the self correcting system and if that is the case should I also get the computer and wiring hardness to complete the system? Unfortunately the plate on the plenum that identifies the engine was gone and I don't know how else I can identify it but if it is in fact and HO then I will just get the cam out of a 351w so I don't have to do a roller conversion.

 

ok ... the 91 MK VII is a roller cam engine exact copy of a mustang its an HO so your good there ... the BAD ... Crown vics are not HO also they are not SEFI they are just EFI ( s = sequential ) so that harness and comp are not going to work so well ..... if your looking to make power ... can ya dumb an HO down to a standard ...YES ... but ya have to change cam , need TFI module changed also the injector harness off VIC harness .... my best advice keep engine and all EFI components that came off Mark VII ...get new MAF sensor from store find a mustang MAF harness and computer don't forget ya will need fuel return system and pump things I have heard people say that are a lie ... all EFI harness's are the same ... no ...read a wire diagram ya need to switch pins a lot of them ... SEFI is the same as EFI ....no regular non sequential is a bank dump 4 injectors Vs each one firing ...

 

sorry mjl351w, but you need to use comma's. Dam that was a hard read.

Read this thread and go to the linked site. It will tell you about everything you need to know about the type of EFI and computer and firing order and all that junk on most cars from ford. https://www.ford-trucks.com/forums/1...t-working.html

 

I know my Grammar is just BAD ... Sorry ... but if you can figure out what I am saying , you can build an EFI system !! lol

 

LOL

 

So will the injector wire hardness that's on my manifold from the mark VII would be compatible with the engine wire hardness out of a mustang the wire on the manifold says that it is an AB style or should I get everything out of a mustang just to be safe?

 

Thank you very much for that link, so according to that website the 1991 crown Victoria uses a MAF sensor and a sequential system so I should be fine by using the computer wiring hardness and maf sensor out of that card, what you guys think? Here is a table thable that talks about cars and there respective computers.

 

Well I don't know how to add a picture

 

but, if you look at the ecu pin-out they are slightly different. for the most part the same but a couple of differences. Not sure what would be needed to make it work. Might just be switching a couple of pins, might have to add a wire and plug, I didn't look that close.